/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package multiface.awwadco.servlet;

import java.io.IOException;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import multiface.awwadco.jpa.File;
import multiface.awwadco.jpa.PersistenceManager;
import multiface.web.util.ResizeBufferedImage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 *
 * @author Simona
 */
@WebServlet(name = "GetImageServlet", urlPatterns = {"/GetImageServlet"})
public class GetImageServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    private static Log log = LogFactory.getLog(GetImageServlet.class);

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        try {

            EntityManagerFactory emf = PersistenceManager.getInstance().getEntityManagerFactory();
            EntityManager em = emf.createEntityManager();

            int fid = Integer.parseInt(request.getParameter("fid"));

            File p = em.createNamedQuery("File.findByIdfile", File.class).setParameter("idfile", fid).getSingleResult();

            response.setContentType(p.getTipo());

            ServletOutputStream o = response.getOutputStream();
            if (request.getParameter("th") == null) {
                if (request.getParameter("w") == null) {
                    o.write(p.getBytes());
                } else {
                    o.write(ResizeBufferedImage.resizeImageProporzionalWith_BytesToBytes(p.getBytes(), Integer.parseInt(request.getParameter("w"))));
                }
            } else {
                o.write(p.getBytesTh());
            }


            o.flush();
            o.close();

            em.close();
            //emf.close();

        } catch (Exception ex) {
            log.error(ex);
        } finally {
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
